Improvement in fastenings for flasks or molds



ORRIN II. BURDIOIQ OF AUBURN, NEV YORK, ASSIGNOR TO I-IIMSELF AND DAVIDM. OSBORNE.

||V ||3l:iOVElV|l:NT IN FASTENINGS FOR FLASKS OR lVlOLDS.`

Specification forming part of Letters Patent N o. 42,543, dated April26, 1864. y

To all whom t may concern:

Be it known that I, ORRIN II. BURDICK, of

Auburn, in the county of Cayuga and State ofl New York, have inventedcertain new and useful Improvements in Fastenings for Flasks, Molds,&c., for Casting Metals in; and I do hereby declare that the followingis a full, clear, and exact description of the same, reference being hadto the accompanying drawings,

making a part of this specification, in Which Figure l represents anelevation of a flask set up and fastened and ready to receive thepouring of the metal. Fig. 2 represents a front view of one of thefastenin gs of full size. Fig. 3 represents a horizontal and Fig. 4t avertical section through the same, as represented in Fig. 2.

Similar letters of reference, Wherever they occur in the separatefigures7 denote like parts in all the drawings.

Flasks or molds are always composed of at least two parts-Viz., thenowel and the cope-and sometimes of more than two parts, withoutincluding the base. The nowel contains the bulk of the casting, andconsequently is subjected to the greatest degree of heat-,which drawsits sides together, or toward the heat, and on this account any kind offastenings of a permanent character and which serve as guides and at thesame time make a close and secure connection will fail, because thenowel will shrink or be drawn away by the heat and will take its part ofthe fastening with it. One part of my invention aims at remedying thisdefect by making one part of the fastening adjustable, so that as it isdrawn out of its exact position it may be returned again almostinstantly and without jarring or damage to the mold.

Another c'lifficulty experienced in the use of the fastenings as nowmade is that in pressing the cope down and fitting it `upon the nowel,as also in lifting it up and drawing it therefrom, unless the same isdone with very great care and precision, some part of the tongue, pin,or hook will pinch or bind upon the hole, clasp, or eye into or throughwhich it passes, and thereby not only greatly impede and obstruct theoperation, but also frequently jar and injure the sand-mold within. Thesecond part of my invention and improvement is intended to obviate thisdefectv among others; and it consists in the use of a tongue on one partof the fastening and a recess of corresponding shape upon the other,said tongue being made slightly slanting from the side of the flask,whereby all tenden 3y to bind or pinch when the cope is being pressedupon and tted to the nowel or when being lifted or taken therefrom isentirely obviated.

Another difficulty experienced iu using the present mode of fasteningarises from the fact that no contrivance heretofore known or used servesto lock vthe parts together simply and v securely and so as to keep themin proper posit-ion both vertically and laterally, and the third part ofmy invention and improvement is intended to furnish a method of sofastening the parts of the flask together as to obviate these amongother difficult-ies; and it consists in making the lower part of theshoulder, which is upon the lower part of the fastening and ofconsiderable length, straight, so that when the key or pin is thrustthrough upon the outside of t-he flask and along said lower surface ofsaid shoulder in its whole length and into and through the slot or notchin the tongue intended to receive it, it will not only press against thelower surface of said shoulder, but also against the surface of thelower part of said notch, and thusV securely lock and hold the parts inplace both laterally and vertically.

To enable others skilled in the art to make and use my invention, I willproceed to describe the same with reference to the drawings.

In Fig. l, A represents the cope, B the nowel, and O the base, of anordinary flask, which parts are represented as held together and matchedby my fastenings at the sides and ends, and by one, two, or more sets offastenings, as may be required. The fastening is made of two parts D E,of which the part D may be flat and fastened to the cope or the base orbottom board, as the case may be, while the other part E is made convexon its back andis fastened to the mold. The cope and base-board can bebraced, so as not to be drawn out of a true line by the heat of thecasting; but the nowel cannot be braced, and consequently will be drawninward by the heat, and for this reason the part E, which is thecompensating part or portion, is united to the nowel. 0n the part of thefastening there is a recess a a, which I make angular; but theparticular form whereof is not matcrial, and on the part D there is atongue c c of corresponding form to fit the recess, and when the two areslid together they gage and match the two parts of the ask, to whichthey -are respectively attached both vertically and laterally, and bringthem together with great precision and without any jar. The undersurface of the two parts forming the recess d a is made straight, so asto constitute a shoulder, against which the key or pin n presses whenthe parts are locked together. Upon the inner side of the tongue a notchor slot is made, the upper part whereof is flush with or above the lowersurface of the shoulder, and when the two parts of thefastening cometogether there is an opening t throu gh between the outer surface of theunder part of the fastening and in the notch so made in the tongue ofthe other part of said fastening, so that an ordinary nail n, passedthrough said opening horizontally, locks them both tightly and securelytogether, both vertically and laterally. The recess a a being open andnot like dowel pins and holes and the tongue beyin g slanted slightlyfrom the sides of the Hask, they guide and match readily and may befitted together Without the least jar or trouble. The convex part E, asshown more particularly in Fig. et, stands oli from the nowel, and bymeans of the set-screwm,passing through this portion and into the noweland the per m anent screws 0 0, the nowel may be drawn out, so as tomatch the tongue of the other portion Whenever it Warps or is drawn inby the heat.

To fasten the key to the flasks causes niuch trouble, as it isconstantly Agetting in the way. When loose, it is often mislaid or lost.For these reasons I prefer using a common nail, which can always beconveniently had.

Having thus fully described my invention, what I claim is l. Making thepart E of a two-part fastening for flasks convex, substantially as andfor the purpose described. 2. In combination with the two parts E and D,the recess in the one and the corresponding tongue in the other,substantially as and for the purpose described.

3. The combination of the ton-gue, the corresponding recess, and the keyor pin for locking and holding together the different parts of a ask,substantially as and for the purposes described.

O. H. BURDICK.

Witnesses: p

DAVID WRIGHT, RoLLIN TRACY.

